AT&T准则下完全检验的最优设计

本文研究了完全检验的质量控制问题,将广泛用于X-控制图的AT&T准则应用于完全检验,并根据完全检验的特点,提出一种新的最优模型,数值实验结果表明AT&T准则下的完全检验优于传统的完全检验.     

EVA实战报告——美国波士顿商学院访华课题汇报之_

越来越多的中国公司开始关注EVA,但是却发现自己缺乏相关的实施经验。而很多美国公司如可口可乐及AT＆T早在上世纪80年代就已成功使用EVA来管理公司,如今在美国仍有数百家企业在采用EVA管理方法。     

ESSENTIALLY NORMAL ＋ SMALL COMPACT = STRONGLY IRREDUCIBLE

Given an essentially normal operator T with connected spectrum and ind(λ -- T) > 0 for λ in pF(T) ∩ σ(T), and a positive number ε, the authors show that there exists a compact K with ‖K‖< ε such that T + K is strongly irreducible.     

Existence Of A Positive Solution For A First-Order P-Laplacian Boundary Value Problem With Impulsive On Time Scales

In this paper, we consider the existence of a first-order p-Laplacian boundary value problem with impulsive:  Φ (y △ (t)) = h(t)f(y(t))   t ∈ [0,T] T \{ τ }, Imp(y( τ ))=Iy(t), y(0)=B 0 (T). Using the fixed theory, we obtain some new resolutions, the main contribution is combining the first-order p-Laplacian boundary value problem with impulsive dynamic equation. We process skills for pulse and establish the operator, the result and significance have their particularity and reference.     

PROPER SPLITTINGS FOR RESTRICTED LINEAR EQUATIONS AND THE GENERALIZED INVERSE A_(T,S)~2

This paper presents a proper splitting iterative method for comparing the general restricted linear euqations Ax=b, x ∈T (where, b ∈AT, and T is an arbitrary but fixed subspace of C~m) and the generalized in A_(T,S) For the special case when b ∈AT and dim(T)=dim(AT), this splitting iterative methverse A_(T,S) hod converges to A_(T,S)b (the unique solution of the general restricted system Ax=bx ∈T).     

基于多点报警的多元统计过程控制

本文主要研究了一种将控制图的报警准则由一点改为多点时多元控制图的构造,对于不同的多点报警准则的控制图可以通过计算平均运行长度的方法得出了不同的控制限参数。然后本文对各种报警准则下的多元控制图与Hotelling T2控制图,MCUSUM(多元累计和控制图)和MEWMA(多元指数加权移动平均控制图)进行了比较,说明这种改变报警规则的多元控制图在监测过程中出现的微小波动时具有一定的优势。     

THE SOLUTION OF b的偏导-EQUATION OF （P,Q）-FORMS AND IT′ S L^p ＆ HOLDER ESTIMATES ON A STEIN MANIFOLD

By using the kernel of J. P. Demaily &;amp; Laurrent Thiebaut, the author constructs two opertors T and S which are compact and obtain the solution of b的偏导-equation of (p,q)forms and L &;amp; Holder estimates on a Stein Manifold.     

用正交相似运算来转置矩阵

<正> 在文[1],Hills 给出了如下定义.设 A 是一个(实)方阵,若存在可逆方阵 T,使得 T~(-1)AT=A′,T~(-1)A′T=A     

轴对称非协调元收敛理论与方法

基于加权Sobolev空间理论,建立了轴对称非协调元收敛准则。首先给出了轴对称非协调元的广义分片检验和F-E-M条件。又给出了一个既可用于检验单元收敛又可用于指导设计单元的轴对称非协调元收敛准则——强分片检验(SPT)。按此收敛准则建立了构造轴对称非协调元的一般方法。     

关于实对称矩阵的基本定理

重新证明了实对称矩阵的基本定理:对于任意一个实对称矩阵A,存在实正交矩阵T,使得T′AT成对角形.     

两种不同系统因素影响下完全检验的最优设计

本文研究了两种不同系统因素影响下完全检验的质量最优问题 ,采用有两种不同控制界限的控制图来控制生产过程 ,并根据完全检验的特点 ,提出了一种新的最优模型。 Hui(1 991 )提出的最优模型是本文的最优模型的特殊情况 ,并且本文建立的最优模型还可推广到两种以上不同的系统因素下影响的情况     

Joint determination of production quantity,inspection schedule,and quality control for an imperfect process with deteriorating products

In this paper, we study the simultaneous effects of both deteriorating product items and deteriorating production processes on economic production quantity, inspection schedules, and the economic design of control charts. Deterioration times for both product and process are assumed to follow arbitrary probability distributions. The product quality characteristic, however, is assumed to be normally distributed. Applications of the proposed model are demonstrated through illustrative examples.     

Optimal np control chart with curtailment

This article presents an algorithm for the optimization design of the np control chart with curtailment. The objective is to maximize the effectiveness of the np chart, while holding the false alarm rate at a specified level and maintaining its simplicity for understanding and operation to a large degree. The optimization algorithm can be applied to a 100% inspection as well as a general random sampling inspection. The effectiveness of the chart is measured by the out-of-control average time to signal (ATS) under the steady-state mode. This mode allows a shift in fraction nonconforming, p, to occur at any time during the inspection of a sample and, therefore, provides more realistic results than the zero-state mode. According to several performance studies and an illustrative example that are conducted in this research, the optimal np chart with curtailment may reduce the out-of-control ATS by nearly half, on average, compared to the conventional np charts.     

On‐line evaluation of the stability of an inspection process

This article proposes control charts to monitor an inspection process based on the defective proportion of the inspected parts. The focus is on inspection process where the incoming parts form a sequence of independent units, such as unrelated clients arriving at a service facility. An example of this kind of inspection process is the periodic motor vehicle (PMVI) inspection. The effectiveness of the proposed control is evaluated using Monte Carlo experiments and is applied to an actual PMVI station. Copyright © 2009 John Wiley & Sons, Ltd.     

基于正态分布的逐批抽样检验贝叶斯控制图控制限研究

在生产条件受控的状态下,先验分布与后验分布应服从同一分布,在假设该分布为正态分布的前提下,根据贝叶斯理论推导出均值、极差和标准差的迭代计算公式,并依此计算控制图的控制限,使有效的先验批检验信息得到充分运用,弥补传统控制图在小批量生产环境下样本信息不足的缺点。研究发现,基于贝叶斯原理的统计控制图控制限随着检验批次的逐渐增加,更接近控制界限的实际值,比传统控制图的控制效果更加可靠、有效。     

Economic design of variable parameters <Emphasis Type="Italic">X̄</Emphasis> control charts for processes with fuzzy mean shifts

Modern studies have shown that the X? control charts with variable parameters (VPs) detect process shifts faster than the traditional X? control charts. This article developed the economic design of the VP X? control chart to determine the values of the design parameters of the chart. However, this study, different from previous studies, was focused on the process that is subject to a disturbing cause, and the occurrence of the cause can result in a fuzzy mean shift (ie the magnitude of the mean shift could not be recognized exactly). The issue of economically selecting the design parameters for the chart was firstly formulated as a mathematical programming model with a fuzzy objective function that could cope with fuzzy number type of mean shift. A fuzzy-simulation-based genetic algorithm was then employed to search for the optimal values of the design parameters from the model. An industrial example was provided to illustrate the solution procedure, and was used for comparison between the VP and the traditional X? chart. Effects of model parameters on the solution of the economic design were also discussed.     

固定时间域可变采样间隔的统计控制图

本文从提高统计控制图对过程波动检测能力和方便管理的角度出发 ,对可变采样间隔(VSI)控制图进行改进 ,提出了针对连续过程质量控制应用需要的固定时间域可变采样间隔(VSIFT)控制图。文章详细介绍了VSIFT均值极差控制图、VSIFTEWMA控制图的设计 ,并分别评价了它们对过程异常状态的检测能力     

Economic design of inspection procedures using guard band when measurement errors are present

One of the most important aspects in designing production systems is implementing an adequate inspection procedure to ensure the product quality. Our literature study indicates that two important questions still remain unanswered. First, most of the previous studies on inspection procedures are mainly concerned with how to evaluate and analyze the adequacy of inspection procedures during a production stage. Although the issue of the adequacy of inspection procedures at this point is clearly important, many production processes may better benefit from designing enhanced inspection procedures during an early design stage. Second, the majority of previous studies do not incorporate possible economic impacts of measurement errors when inspection procedures need to be designed. More extensive efforts in designing inspection procedures need to be investigated based on economic considerations. Two approaches, the use of guard band and the selection of inspection precision level, are simultaneously examined for designing economic inspection procedures. By incorporating these two approaches, this paper proposes an optimization scheme for economic design of inspection procedures. A numerical example along with sensitivity analysis demonstrates the applicability of the proposed model.     

可变抽样区间的非正态EWMA图的经济设计

本文主要讨论非正态总体下,可变抽样区间的EWMA图的经济设计问题。首先利用Burr分布近似各种非正态分布,建立可变抽样区间的非正态EWMA图的经济模型,使总期望费用最型小来确定参数的最优值;其次用遗传算法来寻找该经济模型的最优解,并给出工业中的一个例子;最后对可变抽样区间的非正态EWMA图的经济模型进行灵敏度分析。